Recent content by yoda05378

nevermind. i figured out where i went wrong (i treated the matrices as if they were scalar, stupid me). thanks for all the help :sarcasm:

when you assign values into variables, it should read: negative[spotneg] = numbers[index]; not the other way around (you aren't putting values from negative[] into numbers[], you want to sort the negative ones from numbers[] into negative[]

hi, i seem to have some trouble proving: Suppose M = [A B:O C], where A is a kxk matrix, C is a pxp matrix, and O is a zero matrix. Show that det(M) = det(A)det(C). my attempt at a proof: det(M) = det(A)det(C) det[A B:O C] = det(A)det(C) AC - OB = det(A)det(C) AC =...

why is it useless?

i think he meant 21-122 course. cronxeh, think before you type.

awesome! thanks OlderDan! :smile: :biggrin:

4 things of 1st kind combined with 4 things of a 2nd kind combined with...4 things of a 13th kind = 4^13? so [4^13 / C(52, 13)] is the probability?

umm...13 cards in one hand, so i choose 13 out of the 13 available cards from a suit? i'm just trying to make some sense out of the examples from my book... I'm so confused :(

oops, i meant: [C(13,13) / C(52, 13)]

that's 13 different cards and i choose 7 of them: C(13,7)? so [C(13,7) / C(52, 7)] is the probability?

hi! i have a homework problem here that I'm stuck on: What is the probability that a hand of 13 cards contain no pairs? i know a 13-card hand is C(52, 13) but i have no idea how to represent the probability of that 13-card hand containing no pairs. can anyone give me a hint?